DYNAMIC PRESSURE DETECTOR OF AIR FLOWING INTO INTERNAL-COMBUSTION ENGINE

摘要

PURPOSE:To carry out various of controls with a high precision and improve the functions of the engine by obtaining a dynamic pressure of inflow air by substracting the static pressure detected value of inflow air within a suction manifold from a pressure detected value of the sum of the static pressure and the dynamic pressure of inflow air between the throttle valve and the suction manifold. CONSTITUTION:The detector comprises a pressure sensor 11 for detecting a pressure (static pressure) P1 within a surge tank 4 provided on the downstream of a throttle valve 3 of a suction pipeline 13 and a pressure sensor 12 for detecting a pressure P2 within a suction pipeline 13 between the throttle valve 3 and the surge tank 4. The pressure P2 detected by the pressure sensor 12 is equal to the sum of a static pressure PS and a dynamic pressure PD of inflow air immediately after the throttle valve 3. The outputs of respective pressure sensors 11 and 12 are inputted into a control circuit 9 and the pressure P1 is subtracted from the pressure P2 to obtain the dynamic pressure PD. The basic injection quantity is searched by map based on the basic dynamic pressure N and the pressure P1. The basic dynamic pressure B and the above detected dynamic pressure PD and the like thereby to calculates the final fuel quantity.